I had XPRO V3 working fine, until this afternoon. I was configuring homing settings and after making necessary changes to grbl config.h file and compiled it in Arduino, I was flushing the .hex file to my XPRO board, when suddenly all the light on the board turned off and I can only see the 5V green LED, and flickering green LED on the USB port on the board.

Turned all powers off and reconnect all cables and tried to power on the board, but there is only the 5V green LED, this time this is from 24V reaching the board. Other than that no LED of the motors is on, lifeless. Universal GCode sender, connects to the port but grbl information is not replied.

@drfirew for prompt assistance, please post this question directly on the forum rather than to individuals. You'll get a ton more responses and others will also see this and get the help they need with same/similar issues. Thanks.

So I am a senior in college doing mechanical engineering. For one of your projects, I was thinking of using your project "v-slot linear actuator". I just had one question but the accuracy of the system. How accurate do you think we would be able to control the linear position of the trolley on the linear rail?

Hello Smfuller, welcome to OpenBuilds!
Sure I would say it really depends on if you mainly want to do 2D cut out s and pocketing or full on 3D relief type carvings. Have a look at Vectics products and compare - http://www.vectric.com/products/compare.html

Hey Mark, I am new to the CNC community. I was looking at buying a C-Beam and was wondering if this build would be OK to use a laser diode down the road and alternate between them? And would I need to change out anything on the machine in order to do this i.e. boards, frame work etc;

Welcome to the awesome OpenBuilds community! Yes I see no reason why you could not attach a laser diode down the road if you would like to, in fact guys here do it all the time in that they have both diodes as well as mills on the same machine. Hope this helps and we look forward to your Build, please share.

Hi Mark, I'm just getting started with DIY CNC machines and love all the info here at Openbuilds. I want to build a machine similar to the Ox you did but I'll have to do it in increments. Do you think I could use Corian (a solid surface counter-top material) to make the plates, it's 1/2 inch thick, very sturdy and machines nicely. Thanks, I'm chompin at the bit to get started!

Hi @RedGreen Welcome to the OpenBuilds club and to the world of CNC machines! You found the right place to start. Just pick a machine you would like to build and join in on the discussions on the Builds page (tab at the top of the build). There are lots of great folks ready to help you get up and running. Have fun :)

I love the MiniMill and plan to purchase the build kit. However, I am already interested in increasing the X axis travel and thought about purchasing a longer piece of C-beam and longer lead screw to do so. What is the maximum you think can be supported off of the Y axis travel C-beam without changing the entire design. I'm willing to purchase reinforcement pieces as necessary.

Hello,
Need some advice regarding choosing between C- Beam XL or OX.
Plans are to later add 17W diode laser on Z axis.
Which one is to preffer. If I choose OX I will almost att once change it to OX Metal with lead screws so cost will be the same.
I do not like belts on any machine.
All tips are wellcome.
// Oliver

It sounds like your best set up right out of the gate would be to go with the lead screw driven C-Beam XL if you are wanting a lead driven machine to work with a diode this should work well for you. You can always use it to make plates as well if you decide to go with a larger machine down the road.

Hi, I purchased a C-Beam XLarge kit from Ooznest in the UK; very good experience and producing some really nice parts, 2d and 3d. I wonder if I could get your opinion on changing the 250mm long c-beam Posts that support the X Gantry to say 300mm in order to increase the Z travel?

I have just retired and looking to extend my woodworking hobby to include CNC C-Beam machine.
I'm looking at purchasing this unit from Ooznest in the UK. Can you tell me if their materials are to a satisfactory standards and original concept by Mark.
I have no idea what I am getting into and not at all sure if all this is within my capabilities anyway especially when it come to the software and design.
Regards
Tony

Hello Tony, Welcome to CNC once you start you will love it! Dive right in and have fun. The Ooznest guys are great and they will have you up and running in no time. The OpenBuilds resource here is the best in the world so be sure to check in on all the helpful tips and ideas here on the forum.

Hello @Gonçalo martins I do not have this particular setup but I will give some advice that may help.
Not sure if this will help but from this statement "Or rather loses the coordinates." it seems to me that it could be your unit of measure (mm/in) not set right in your code vs. the control software.

This is a long shot but to be honest though to tell from whats explained. If this does not work for you please use the support forums to work with the community to see if we can try to figure out what may be going on.

I am new to this forum and like to build the Ooznest OX CNC Machine build in 'Cartesian Style CNC' published by Ryan Lock, Jul 20, 2016. Can someoneplease help me to recalculate this spread sheet to a working space from 450 x 1200 x 100 mm ? I hope someone can help me.

Hello @MeindertJB , thank you for reaching out to us. I did not make the spread sheet so not sure there but I think that your best best for this answer would be to reach out on the Ooznest OX support thread.

The parts list would be the same. It would be just the extrusion lengths which would need changing. The spreadsheet is for a 500x750mm machine. All you need to do is take 50mm off all the 20x40 & 20x60 extrusions (Except the 20x60x200mm). And add 450mm to all the 20x80mm extrusions.

Mark,
I was wondered if you could share where you sourced the green connectors on the APEX design that go from the PCB to the stepper driver. I have a control system (non CNC) for a laboratory sample system that currently has too many wires that I would like to neaten up. If you can help I would greatly appreciate it!

Mark, Every time I buy something at the parts store additional emails of the same news announcement are sent to me. The last count was 32 emails announcing the Mini-Mill package. Mark, I only need one. Can you fix this? John Mark Roberts

thanks on post processor as i'm qa newbie at this i find it daunting apart from rewriting the circuit board i'm trying to plot there must be a way to tell grbl every Z andZ-1 command (pen up Down etc)that Hpxx2 nc file can change to see M03 and M05 commands you have been a great help so far at least someone knows i trying

" there must be a way to tell grbl every Z andZ-1 command (pen up Down etc)that Hpxx2 nc file can change to see M03 and M05" Not sure if it can done in grbl but, since it is a text file you could always use a good text editor that can do replace and you should be able to replace all the Z to M.

thanks mark im new at this i built dirks curcuit plotter won,t work so i use robbitin,s servo grbl fofr plotter but when i try to draw circuit file gcode nc uses z1 z-1 pen up pen down but grbl uses m03 m05 i dont want to use different software to change gcode any suggestions please and thanks

Hello @Rego it looks like you could create a post processor to convert the Z moves into m. But if like you say you don't want to change the gcode you best bet would be to ask for this support on the robbitin github - https://github.com/robottini/grbl-servo/issues
or ask how Dirks did his, my guess is that he did a pp from the nc file.

You could use a simple text replace editor as well and see if you can do a batch change of all instances of m3 an 5 to z moves essentially what the pp would do. Hope this helps. If not please ask this question on the general questions thread and someone will be happy to help - http://www.openbuilds.com/threads/open-build-parts-for-sale.9096/

To Mark Carew. Sir I was watching your great video on how to build a CNC machine, the full one. You said that there is software on your site, I CAN not find it, could you help out, I also liked the drawing you had. My build is exactly like yours, I followed every thing, I had to watch the video 6 times, you said the type of board you are using but I could not hear what you said,

Hi mate
I buy XPro v3 controller and I have problem. On the smoth corners tweak(shake) when run slow. I can't run fast because I made some of carbon fibre and small shranks. Any ideas?
I run my OX like
$110=500
$111=500
$120=10
$121=10

Hope and trust you are doing OK.
I have recently purchased a 2.2kW spindle and VFD.
With particular interest in the 40 x 40 V-Slot: Is there any chance you might expand the range to include a 40 x 80 V-Slot ?
Would the standard 80 x 20 and or C-beam be strong enough to cope with the stresses generated by the 2.2 kW spindle?
Regards

There is the 40x80 C-Beam . From what I can find the 2.2 weighs about 8kg (17lbs) so that is beefy for sure and more then likely overkill for the type of work we do here. But you can never how too much power :D My suggestion is to use 2 C-Beams in parallel on the X axis using the 2 C-Beam XL plates mounted together with a plate for mounting the Z axis.

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